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\ i A. J. SIMMONS. APTARATUS TOR INJEGTING AIR AND STEAM INTO TURNAGBS.

Patented J an; 3', 1882,

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"Usern TATES PATENT Onere.

APPARTUSF-OR INJECTING AIR ND STEAM INTO FURNACES.

SPECIFICATION forming part of Letters Patent No. 251,740, dated January 3, 1882.

Application filed June 8, 1881. (No model.)

To all whom it may concern:

Be it rknown that I, ALoNzo- J. SIMMONS, of Indianapolis, Marion county, Indiana, have invented a new and Improved Apparatus for Injecting Air and Steam into Furnaces; and I do hereby declare that the following is a full, clear, andexact description of the saine.

A It is well known that a more 'perfect combustion of fuel in furnaces, and-consequent reduction in the volume of smoke produced, is

` obtained by injecting suitable quantities of air and steam into the furnace, commingled in proper portions.

` The object of my invention is to provide simplc and effectual means for accomplishing the results above named, and also in securing the most perfect distribution of the oxygenated gases over the bed of heated coals,to bring them in direct contact with the gases of combustion while heated to the required degree to support combustion; and the improvement consists, first, in combining a series or nest of air tubes or nozzles with a steam-drum so that the air-tubes will vpass diametrieally through the steam-drum, which is connected to the steam-space of the-boiler by a single pipe, and so that each ofthe air-tubes will communicate with the steam-drum in such manner that the air can be drawn through the tubes and forced into the furnace by the action of' the steam 5 second, in combining a series of air pipes and nozzles with a steam drum so that nthey will pass diametrically through it and will protrude one into the other in such manner that a space will be left between them, through which steam may pass from the interior of the drum in a tubular sheet into and through the nozzle, in such manner as to draw air through the pipe encircled by the steam and force it into the fire or combustion chamber, the relative quantities ot' steam and air being adjusted by screw-A threads upon the thiinbles, air-pipes,nozzles, and steam-drum; third, in arranging a nestor series ot'injection-11ozzles relatively with a delector-plate secured to theinner wall ot' the furnace, which will serve to deflect the'oxygenated gases upon the entire mass of fuel at such distance from its surface as to insureits proper distribution and the complete combustion ot' the entire body of coal upon the gra-tes.

In the accompanying drawings, Figure l is an elevation showing the inner side of the furner', with outer plates, A, and inner plates, A',

held at a suitable distance apart by stay-bolts `B, and provided with an angle-ironLG, secured to the face of the linner plate, that serves to support the grate-bars of the furnace in an effectual manner. Acylindricaldrum,lD, closed at'oue end and communicating at the other end by pipes D with the steam-space of the boiler,is arranged horizontally alongside of the outer wall of the furnace, and is supported by a strap or straps, E, secured to the outer plate, A, of the furnace casing. The center line ofthe drum D is arranged in a horizontal line which will come a few inches above the surface of the coals upon the grate-bars, and the drum is connected to a series ot' nozzles, E', in the said centralline, at suitable distances apart, that pass through and closely lit the interior of hollow stay-bolts B', sothat gases pissing through the nozzle will be diverted over the surface of the burning coal. The nozzles E are provided each with a shoulder, e, some distance from its outer end, that is screwthreaded a'nd tits a corresponding thread in the drum D. The inner end of each nozzle E passes horizontally across the steam-drumto its central part, and is provided with a conical central opening into which the .end of a correspondingly-coiled pipe, F, projects a suficient distance to leave an annular conical space, f, between them, which space is left open to communicate between the interior of thedrum D and the lire-chamber. The pipe f passes through the drum D in a horizontal lineimmediatelyopposite the nozzle E', so that the nozzle and pipe will pass diametrically through the drum. The pipe F is open at its outer end to allow the outer air to be freely drawn into it and forced through the nozzle E by the steam passing in arapid current through the annular spacefaround the conical end of thepipe. The outer end, F, of the pipe F is cylindrical, and is screw threaded to lit into corresponding threads 'in the drum D. A nut, F2, is also screw-threaded upon its inner snrface, and also upon one end ot'its outer surface, by which means an adjustable steam-pipe connection is formed between the pipe F .and the IOO drum D, by which means more or less steam can be a'dmitted around the pipeF into the furnace by first slacking back nut, F2, and turning pipe F in one direction or the other, as desired, to increase or decrease the amount of steam admitted to the furnace, and then by screwing up back nut, F2, to make a steam-tight joint.

A deiiector-plate, G, of an gie-iron, is secured to theinner wall, A', of the furnace at a downwardly-inclined angle at a point, immediately above the nozzle-openin g e2 of the nozzles E', so that as the mingled air and steam issues in a jet from the nozzles it will be shed downwardly in afan-shaped sheet to project across the flame or radiant gases in the process of combustion upon the surface of the coal, and be diverted tothe surface of the coal in the central part of the grate, at the point where the greatest amount of oxygen is consumed and isthe most remote from the ordinary supplies; The air is sufficiently heated by the steam to prevent it .from chilling the iame upon the coals, and by its admixture with a suitable amount of steam the commingled gases are expanded to a sutlicient extent to admit ot' a rapidcombustion of the. carbonated gasesof the furnace by their union under suitable conditions with the oxygenated gases injected into the furnace.

The deiiector G may be formed of a single Theangle-plate O, upon which the ends of y the grate-bars are supported,'extends entirely across the surface of the inner plate, A', and operates to effectually check cold currents ot' air from creeping up the sides of the furnace and chilling the llame.

I claim as myinvention and desire to secure by Letters Patentt The combination, with the furnace, of thc steam drum D, the steam nozzle E', one of whose extremities extends within the hollow staybolt B', the other having a conical mouth extending` half-way through the drum, staybolt B, air-pipe. F, extending a short distance inside the mouthof said steamnozzle, and the nut F2, having outside threads correspondingl with other threads in the side of the steamdrum and inside threads corresponding with other threads upon the outside-ofthe air-pipe, substantially as and for the purposes described. y

ALONZO J. SIMMONS. W'itnesses:

W. H. EssIoK, E. H. BROWN. 

